var bFormPass=true;

function check_URL(URLobj)
{
	var isValid = true;
	if ((URLobj.value.indexOf('http:\/\/', 0) == -1) || (URLobj.value.indexOf('.', 0) == -1) || (URLobj.value == "http://")){
		alert( URLobj.value +" is not a valid URL." +"\nExample of a valid URL: http://www.example.com");
	}
	return isValid;	
}


function check_email(emailobj)
{
	var isValid = true;
	if (emailobj.value.indexOf('@', 0) == -1) {
		alert( emailobj.value +" is not a valid e-mail address." +"\nExample of a valid e-mail address: john@example.com");
		isValid = false;
	}
	return isValid;
}


function clear_field(inputObj)
{
	inputObj.value="";
	inputObj.focus();
}
		
		
function trim(str)
{
   return str.replace(/^\s*|\s*$/g,"");
}
		
function check_isitempty(inputObj)
{
	var IsEmpty=true;
	if(trim(inputObj.value) != "")
	{
		IsEmpty=false;
	}
	return IsEmpty;
}		

function check_now(input,checkmedia){
  var i;
  var j;
  var found;

	if(bFormPass==true){
		lengths=input.value.length;
		check_string=checkmedia;
		for(i=0;i<input.value.length;i++){
			found=false;
			for(j=0;j<check_string.length;j++){
			 	if (input.value.charAt(i)==check_string.charAt(j)){
					found=true;
					break;
				}
			}// end for
			if (found==false){
				alert(input.value +" is not a valid "+input.name);
					clear_field(input);     
					break;
			}
		} //End for 
	} //end if
}

function returnObjById( id ) 
{ 
    if (document.getElementById) 
        var returnVar = document.getElementById(id); 
    else if (document.all) 
        var returnVar = document.all[id]; 
    else if (document.layers) 
        var returnVar = document.layers[id]; 
    return returnVar; 
}